package simpleftp.server;

import java.net.ServerSocket;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.CompletionService;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

/**
 * Simple serveur TCP creant des thread pour gerer chaque connexion client.
 * 
 * @author lom
 */
public class FTPServerMain {

	/**
	 * Port d'ecoute.
	 */
	public static final int PORT = 7802;
	/**
	 * Socket serveur d'accueil.
	 */
	private static ServerSocket socketaccueil;
	


	public static void main(String argv[]) throws Exception 
	{
		
			final int numberOfCores= Runtime.getRuntime().availableProcessors();
			final double blockingCoefficient = 0.9;
			final int poolSize = (int) (numberOfCores / (1 - blockingCoefficient));
	
	
			final ExecutorService executorPool = Executors.newFixedThreadPool(poolSize);
			final CompletionService<Void> completionPool = new ExecutorCompletionService<Void>(executorPool);
		
		
		
		// TODO MAKE IT MULTITHREAD (about 4 lines)
		try {
			socketaccueil = new ServerSocket(PORT);
			System.out.println("Server up and running.");
			FTPServer.setDebug(true);
			while (true) {
				
				completionPool.submit(new FTPServer(socketaccueil.accept()));
				// TODO Modify for multithreading
			}
		} finally {
			if (socketaccueil != null) {
				socketaccueil.close();
			}
		}
	}
}
